Find the magnetic field at centre ‘p’ due to current $i$ in the conductor as shown in figure

The magnetic field due to the circular wire will be $B=\frac{{\mu }_{0}i}{2r}\frac{3}{4}$

The magnetic field due to the straight wires will be $B\text{'}=\frac{{\mu }_{0}i}{2\mathrm{\pi }r}\frac{1}{2}$

So the net magnetic field at P = $B=\frac{{\mu }_0}{4r}\left[\frac{1}{\pi }+\frac{3}{2}\right]$